JP6437528B2 - Connector and infusion set - Google Patents

Description

  The present invention relates to a connector and an infusion set, and more particularly to a connector capable of connecting a male connector such as various medical devices, and an infusion set including the connector.

  Conventionally, when performing infusion, blood transfusion, artificial dialysis, etc., the liquid is sent into the body using a medical tube. When another liquid such as a chemical solution is merged with the liquid in the tube, a connector capable of liquid-tightly connecting a male connector such as a syringe or a luer taper member and a medical tube is used. A male connector such as a syringe or luer taper member may be referred to as a male luer, and a connector connected to the male luer may be referred to as a female luer.

  A connector to which such a male connector can be connected is disclosed in Patent Document 1, for example. In the medical connector disclosed in Patent Document 1, the locking protrusions of the annular ring and the locking protrusions of the cylindrical mouth body enter into the annular grooves respectively provided on the outer surface and the inner surface of the valve member. It is provided with a mixed injection port that is sandwiched and supported, and the annular fixing portion of the valve member is sandwiched and assembled by the annular ring and the cylindrical mouth body.

JP 2010-148757 A

  Here, the mixed injection port of Patent Literature 1 is provided with an annular fitting groove extending over the entire circumference in the inner circumferential surface of the small-diameter cylindrical portion of the cylindrical mouth, and the gap is formed in the fitting groove. The annular fixing portion of the valve member is in close contact with the entire inner surface of the fitting groove.

  The depth dimension of the fitting concave groove is the protrusion height dimension of the above-described locking projection, and is equal to or slightly larger than the depth dimension of the annular groove of the valve member. In addition, the groove width dimension in the radial direction of the fitting groove is the same as or slightly smaller than the width dimension of the portion protruding to the inner surface side of the constricted portion in the annular fixing portion of the valve member. The dimensional relationship between the outer surface side portion of the annular fixing portion of the valve member and the locking projection of the annular ring is the same.

  That is, in Patent Document 1, the space for accommodating the annular fixing portion of the valve member, which is partitioned by the cylindrical mouth body and the annular ring, is the annular fixing portion in a single valve member that is not assembled in the mixed injection port. The cross-sectional shape coincides with the cross-sectional shape, or the cross-sectional shape that cannot be accommodated unless the annular fixing portion is sandwiched and compressed in the thickness direction and the radial direction.

  However, in the connector provided with the mixed injection port of Patent Document 1, when the valve member as the elastic valve body is sandwiched and compressed, a part of the valve member becomes the locking protrusion of the annular ring and the locking protrusion of the cylindrical mouth body. There is a problem that the central portion of the valve member is loosened by being pushed radially inward from the compressed portion.

  If the opening and closing operation of the elastic valve body is repeated by inserting and removing the male connector while the central part of the elastic valve body is slackened, the elastic valve body will move from the originally fixed position, Even if it is removed, the original position may not be restored.

  In view of the above problems, an object of the present invention is to provide a connector and an infusion set capable of suppressing the occurrence of slack in the central portion of an elastic valve body.

  The connector according to the first aspect of the present invention includes an elastic valve body having a top surface on which a slit is formed and a bottom surface opposite to the top surface, and is in contact with the top surface and the bottom surface of the elastic valve body. A clamping portion for clamping the elastic valve body, and when the elastic valve body is viewed from the top surface side, the clamping portion is provided so as to surround the slit, and the elastic valve body is The peripheral portion positioned outside the position held by the holding portion, and the volume of the peripheral portion in a state where the elastic valve body is held by the holding portion is held by the holding portion. It is larger than the volume of the said peripheral part in the state which is not.

  As one embodiment of the present invention, the elastic valve body has a substantially circular outer shape when viewed from the top surface side, and the circumference of the elastic valve body in the radial direction of the elastic valve body is A housing having an inner wall portion that surrounds the outer peripheral portion in the radial direction is provided, and a gap is provided between the peripheral portion and the inner wall portion in a state where the elastic valve body is held by the holding portion. It is preferable.

  As one embodiment of the present invention, the elastic valve body has a substantially circular outer shape when viewed from the top surface side, and the circumference of the elastic valve body in the radial direction of the elastic valve body is A housing having an inner wall portion that surrounds the outer peripheral portion in the radial direction is provided, and the entire area of the peripheral portion and the inner wall portion are in contact with each other while the elastic valve body is held by the holding portion. It can be configured.

  As one embodiment of the present invention, the elastic valve body includes a constricted portion sandwiched by the sandwiching portion, and the inner wall has a cross section perpendicular to the radial direction and parallel to the thickness direction of the elastic valve body. The inner diameter of the portion is preferably maximized at a position outside the radial direction with respect to the constricted portion.

  As one embodiment of the present invention, in the cross section parallel to the thickness direction, the inner wall portion has a maximum inner diameter at a position outside the radial direction with respect to the constricted portion. It is preferable to have a curved shape protruding outward.

  As one embodiment of the present invention, the clamping part is provided in the housing, and the clamping part is in contact with the annular top surface side clamping part that contacts the top surface of the elastic valve body and the bottom surface. An annular bottom-side clamping part that clamps the elastic valve body together with the top-side clamping part, and the peripheral part has the inner wall part and the top-side clamping part in a cross section perpendicular to the radial direction. And the bottom surface side clamping portion, the top surface side coupling portion that connects one end of the inner wall portion and the top surface side clamping portion, the bottom surface side coupling portion that connects the other end of the inner wall portion and the bottom surface side clamping portion, In the state where the elastic valve body is held by the holding portion, a gap is provided between the peripheral edge portion and the top surface side connecting portion and / or the bottom surface side connecting portion. It is preferable that

  As one embodiment of the present invention, the clamping part is provided in the housing, and the clamping part is in contact with the annular top surface side clamping part that contacts the top surface of the elastic valve body and the bottom surface. An annular bottom-side clamping part that clamps the elastic valve body together with the top-side clamping part, and the peripheral part has the inner wall part and the top-side clamping part in a cross section perpendicular to the radial direction. And the bottom surface side clamping portion, the top surface side coupling portion that connects one end of the inner wall portion and the top surface side clamping portion, the bottom surface side coupling portion that connects the other end of the inner wall portion and the bottom surface side clamping portion, In the state where the elastic valve element is held by the holding portion, the peripheral edge portion and the entire area of the top surface side connecting portion and / or the entire area of the bottom surface side connecting portion are in contact with each other. It can be set as the structure which is carrying out.

  The connector according to the second aspect of the present invention includes an elastic valve body having a top surface formed with a slit and a bottom surface opposite to the top surface, and having a substantially circular outer shape when viewed from the top surface side. And a sandwiching portion for sandwiching the elastic valve body in contact with the top surface and the bottom surface of the elastic valve body so as to surround the slit when the elastic valve body is viewed from the top surface side. A housing, and the housing includes an inner wall portion that surrounds the elastic valve body in a radial direction of the elastic valve body outside the clamping portion in the radial direction, and a maximum inner diameter of the inner wall portion Is characterized in that it is larger than the maximum outer diameter of the elastic valve body in a state where the elastic valve body is not clamped by the clamping part.

  As one embodiment of the present invention, it is preferable that a maximum inner diameter of the inner wall portion is larger than a maximum outer diameter of the elastic valve body in a state where the elastic valve body is held by the holding portion.

  As one embodiment of the present invention, in the state where the elastic valve body is clamped by the clamping portion, the inner wall portion comes into contact with the outer wall of the elastic valve body, so that the maximum inner diameter of the inner wall portion is It can be set as the structure which becomes equal to the largest outer diameter of the said elastic valve body.

  The 3rd aspect of the present invention is an infusion set provided with the above-mentioned connector.

  According to the connector and the infusion set of the present invention, it is possible to suppress the occurrence of slack in the central portion of the elastic valve body.

1 is a sectional view of a connector 1 according to an embodiment of the present invention. 1 is a perspective view of a single elastic valve body used in a connector 1. 3A shows the top surface of the elastic valve body of FIG. 2, and FIG. 3B shows the bottom surface. 4A shows a side view of the elastic valve body viewed from the I direction in FIG. 3B, and FIG. 4B shows a side view viewed from the II direction in FIG. 3B. 5A shows a III-III cross-sectional view of the elastic valve body of FIG. 3B, and FIG. 5B shows a IV-IV cross-sectional view of FIG. 3B. It is the expanded sectional view which expanded a part of section in Drawing 1. It is sectional drawing which shows a connector provided with the holder of a shape different from the holder of FIG.1, 6 among the holders applicable to this invention. It is sectional drawing which shows a connector provided with the holder of a shape different from the holder of FIG.1, 6 among the holders applicable to this invention. FIG. 8A is a cross-sectional view showing a state before the elastic valve body is held by the holding portion, and FIG. 8B is a cross-sectional view showing a state where the elastic valve body is held by the holding portion. FIG. 9 is a cross-sectional view of a connector including a top surface cap having a shape different from that of the top surface cap of FIG. 8 among top surface caps applicable to the present invention. 10A is a cross-sectional view showing a state before an elastic valve body having a shape different from that of the elastic valve body shown in FIG. 8 is held by the holding portion, and FIG. 10B is a view showing that the elastic valve body is held by the holding portion. It is sectional drawing which shows the state. It is sectional drawing of the elastic valve body of a shape different from the elastic valve body shown in FIG. 8 among the elastic valve bodies applicable to this invention. It is sectional drawing which shows the state by which the male connector is inserted in the connector which concerns on this invention. It is a figure which shows the infusion set which is one Embodiment of this invention. It is sectional drawing of the connector as a comparative example.

  Hereinafter, an embodiment of a connector and an infusion set according to the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the common member in each figure.

  First, one embodiment of a connector according to the present invention will be described. FIG. 1 is a cross-sectional view of a connector 1 according to this embodiment.

  As shown in FIG. 1, the connector 1 includes a housing 2 and an elastic valve body 3 attached to the housing 2.

  The housing 2 includes a cap 5 that defines an insertion port 4 into which the male connector 100 (see FIG. 12) is inserted from the outside, and a holder 6 that supports the cap 5. In the present embodiment, the hollow portion 70 partitioned by the cap 5 corresponds to the insertion port 4.

  The cap 5 has a top face cap 7 and a bottom face cap 8, and the elastic valve element 3 to be described later is compressed and sandwiched by the top face cap 7 and the bottom face cap 8 so that the position in the hollow portion 70 is fixed. Yes. In addition, the hollow part 70 as the insertion port 4 described above is partitioned by the top cap 7 and the bottom cap 8 in this embodiment.

  The holder 6 is a member that supports the top cap 7 and the bottom cap 8. In the present embodiment, the top cap 7 and the bottom cap 8 are both supported by being in contact with the holder 6. However, the bottom cap 8 is held by the top cap 7 and only the top cap 7 is attached. A configuration in which the holder 6 is brought into contact with and supported by the holder 6 may be employed. Conversely, the top cap 7 may be held by the bottom cap 8, and only the bottom cap 8 may be brought into contact with the holder 6 and supported by the holder 6.

  Examples of the material of the holder 6 constituting the housing 2 and the top cap 7 and the bottom cap 8 as the cap 5 include polyolefins such as polyethylene, polypropylene and ethylene-propylene copolymer; ethylene-vinyl acetate copolymer Polyvinyl chloride; Polyvinylidene chloride; Polystyrene; Polyamide; Polyimide; Polyamideimide; Polycarbonate; Poly- (4-methylpentene-1); Ionomer; Acrylic resin; Polymethyl methacrylate; Acrylonitrile-butadiene-styrene copolymer Polymer (ABS resin); Acrylonitrile-styrene copolymer (AS resin); Butadiene-styrene copolymer; Polyethylene terephthalate (PET), Polybutylene terephthalate (PBT), Polycyclohexane Polyesters such as phthalates (PCT); polyethers; polyether ketones (PEK); polyether ether ketones (PEEK); polyether imides; polyacetals (POM); polyphenylene oxides; modified polyphenylene oxides; Various resin materials such as sulfide; polyarylate; aromatic polyester (liquid crystal polymer); polytetrafluoroethylene, polyvinylidene fluoride, and other fluorine-based resins; Also, a blend or a polymer alloy containing one or more of these may be used. In addition, various glass materials, ceramic materials, and metal materials may be used.

  The elastic valve body 3 is provided with a slit 9 so that it can be elastically deformed and opened and closed when the male connector 100 (see FIG. 12) is attached to and detached from the connector 1. And the insertion port 4 defined by the bottom cap 8 is arranged to be closed. Specifically, the elastic valve body 3 is clamped by a clamping portion 48 (see FIG. 6) constituted by the top cap 7 and the bottom cap 8, and the position in the connector 1 is fixed.

  The elastic valve body 3 is molded and formed so as to be elastically deformable. Examples of the material of the elastic valve body 3 include natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, nitrile rubber, chloroprene rubber, butyl rubber, acrylic rubber, ethylene-propylene rubber, hydrin rubber, urethane rubber, silicone rubber, Various rubber materials such as fluoro rubber, various heat such as styrene, polyolefin, polyvinyl chloride, polyurethane, polyester, polyamide, polybutadiene, trans polyisoprene, fluoro rubber, chlorinated polyethylene, etc. A plastic elastomer may be mentioned, and one or a mixture of two or more of these may be used.

  Moreover, it is preferable that the hardness of the elastic valve body 3 is 20-60 degrees (A hardness). Thereby, since an appropriate elastic force can be ensured in the elastic valve body 3, the elastic deformation described later can be caused in the elastic valve body 3.

  Details of each member and a characteristic part constituted by each member in the present embodiment will be described below.

[Elastic valve element 3]
FIG. 2 is a perspective view of the elastic valve body 3 alone. 3A and 3B are views showing the top surface 10 and the bottom surface 11 of the elastic valve body 3 alone, respectively. FIGS. 4A and 4B are views of the elastic valve body 3 viewed from I and II shown in FIG. 3B, respectively. A side view is shown. 5A and 5B are views respectively showing III-III and IV-IV sectional views of the elastic valve body 3 in FIG. 3B.

  As shown in FIGS. 2 to 5, the elastic valve body 3 is a disk-shaped disk-shaped valve body having a substantially circular outer shape when viewed from the top surface 10 side. As shown in FIG. 6, in the radial direction A of the elastic valve body 3, from the constricted portion 12 sandwiched by the sandwiching portion 48 (see FIG. 6) of the housing 2 described later, and the position sandwiched by the sandwiching portion 48 in the radial direction A. Also includes a central portion 13 positioned on the inner side and a peripheral edge portion 14 positioned on the outer side of the position clamped by the clamping portion 48 in the radial direction A.

  The top surface 10, which is a part of the outer wall of the elastic valve body 3, is constricted between a central top surface region 15 of the central portion 13 and a constricted portion 12 positioned outside in the radial direction A from the central top surface region 15. The top surface area 16 includes a top surface area 17 of the peripheral edge portion 14 located further outward in the radial direction A than the top surface area 15 of the constricted portion.

  As shown in FIGS. 2 to 5, the central top surface region 15 extends in the radial direction A outside (upward in FIGS. 4 and 5) outside the constricted portion top surface region 16 and the peripheral edge top surface region 17. A flat central plane portion 18 and an annular side wall portion 19 extending in a thickness direction B (a direction perpendicular to the radial direction A) orthogonal to the central plane portion 18.

  A single-letter slit 9 is formed in the center of the central plane portion 18. The slit 9 is formed by molding, and does not penetrate to the bottom surface 11 at the time of molding, but penetrates to the bottom surface 11 when the first male connector 100 is inserted after molding, for example. In addition, it is also possible to perform the process of penetrating the slit 9 as a part of the manufacturing process after the mold forming is completed.

  Further, as shown in FIG. 3A, the central flat surface portion 18 of the central top surface region 15 has a longitudinal direction of the slit 9 (see FIG. 3) in a state where the elastic valve element 3 is not accommodated in the insertion port 4 (see FIG. 1). 3A is formed in an elliptical shape having a minor axis on the side (up and down direction) and having a major axis in a direction orthogonal to the longitudinal direction of the slit 9 (left and right direction in FIG. 3A). However, when the elastic valve element 3 is accommodated in the insertion port 4, the central flat surface 18 of the central top surface region 15 has the side wall 19 of the central top surface region 15 on the long axis side of the ellipse. 7 is pushed into the inner wall 42 (see FIG. 1) to form a circular shape, and the inner surfaces of the slits 9 are in close contact with each other and closed. In FIG. 1 and FIGS. 6 to 10 and FIG. 14 to be referred to later, the slits 9 are not drawn in a close-closed state in order to facilitate understanding of the configuration. And is in a closed state.

  Here, as shown in FIGS. 2 to 5, the central top surface region 15 is a curved surface portion that connects the outer edge of the central planar portion 18 and the sidewall portion 19 in addition to the central planar portion 18 and the sidewall portion 19 described above. 20 Specifically, the curved surface portion 20 has an arc shape in a cross-sectional view of a cross section orthogonal to the longitudinal direction of the slit 9 (for example, the cross section shown in FIG. 5A). The side wall 19 is connected. By providing the curved surface portion 20 in this manner, the inserted male connector 100 (see FIG. 12) is removed while the elastic valve body 3 is attached to the housing 2, and the connector 1 (see FIG. 1) is removed. When the pushed-in elastic valve body 3 returns to a predetermined position by a restoring force, the top surface 10 of the elastic valve body 3 is placed on the inner wall 42 (see FIG. 1) of the housing 2 located near the inlet of the insertion port 4. It becomes difficult to get caught. Further, in the present embodiment, as shown in FIG. 3A, in the major axis direction of the elliptical central plane portion 18 (the direction orthogonal to the longitudinal direction of the slit 9 in FIG. 3A), the distance from the slit 9 is far away. A certain curved surface portion 20 has a longer length L of the curved surface portion 20 in the same direction. This is because the elastic valve body 3 is located closer to the outer edge of the central plane portion 18 of the central top surface region 15 that is farther from the slit 9 in the major axis direction of the elliptical central plane portion 18. This is because the inner wall 42 of the housing 2 is easily caught when returning to a predetermined position by the restoring force.

  As shown in FIG. 5B, in the present embodiment, when the elastic valve body 3 is viewed in a cross section parallel to the longitudinal direction of the slit 9 including the slit 9, an arcuate curved surface is formed at both ends of the central plane portion 18. The portion 20 is not provided, and the central plane portion 18 and the side wall portion 19 are directly connected at a substantially right angle, but the curved surface portion 20 is provided over the entire outer edge of the central plane portion 18. When the elastic valve body 3 is viewed from the top surface 10 side, the elastic valve body 3 may be provided so as to surround the periphery of the central plane portion 18.

  As shown in FIGS. 2 and 5, the peripheral edge top surface region 17 of the peripheral edge portion 14 is continuous with the planar peripheral flat surface portion 21 extending in the radial direction A and the inner edge of the peripheral peripheral surface portion 21. And an annular side wall portion 22 in which the inner diameter in the radial direction A gradually decreases as it proceeds toward the bottom surface 11 in the thickness direction B orthogonal to the flat surface portion 21. In addition, although the side wall part 22 of this embodiment is extended in the curved line shape in sectional view of FIG. 5A and 5B, it is good also as a structure extended in linear form in the same sectional view. Moreover, although the side wall part 22 of this embodiment is the structure which the internal diameter in the radial direction A reduces gradually as it goes to the bottom face 11 side in the thickness direction B, it is good also as a cylindrical shape parallel to the thickness direction B. However, if the side wall portion 22 has a tapered shape in which the inner diameter in the radial direction A gradually decreases as the side wall portion 22 proceeds to the bottom surface 11 side in the thickness direction B orthogonal to the peripheral plane surface portion 21 as in this embodiment, the elastic valve body 3, the locking protrusion 41 (see FIG. 6) of the top cap 7 is in contact with the side wall 19 of the central top surface region 15 by the side wall 22 of the peripheral top surface region 17. Further, since the side wall portion 19 is guided so as to be pressed toward the insertion port 4 (see FIG. 6), the position in the radial direction A sandwiched by the sandwiching portion 48 (see FIG. 6) of the elastic valve body 3 varies. It is suppressed. Further, the locking projection 41 of the top cap 7 is guided by the side wall portion 22 so as to come into contact with the side wall portion 19 and further to press the side wall portion 19 radially inward. 3 is clamped by the clamping part 48, it can suppress that the part compressed by the clamping part 48 is pushed out to the insertion port 4 side, and slack arises in the bottom face side of the center part 13 of the elastic valve body 3. FIG. . Details of this will be described later (see FIG. 11).

  The constricted portion top surface region 16 of the constricted portion 12 is a top surface in which the annular side wall portion 19 of the central top surface region 15 and the annular side wall portion 22 of the peripheral portion top surface region 17 are opposed groove walls. This is the annular groove bottom 24 of the surface annular groove 23. A locking protrusion 41 (see FIG. 6) of the top cap 7 described later enters the top surface annular groove 23 and contacts the annular groove bottom 24, and compresses the elastic valve body 3 to form a clamping portion 48.

  The bottom surface 11 which is the surface opposite to the top surface 10 of the elastic valve body 3 and constitutes a part of the outer wall of the elastic valve body, like the top surface 10, has a center bottom surface region 25 of the center portion 13, and The constricted portion bottom surface region 26 of the constricted portion 12 positioned outside in the radial direction A with respect to the central portion bottom surface region 25 and the peripheral portion of the peripheral portion 14 positioned further outward in the radial direction A with respect to the constricted portion bottom surface region 26. And a bottom area 27.

  The center bottom surface region 25 is located on the outer side of the center plane portion 28 on the bottom surface 11 side, which is a surface parallel to the center plane portion 18 on the top surface 10 side, in the radial direction A from the center plane portion 28, and And a central projecting portion 29 projecting outward (downward in FIGS. 4 and 5) from the flat portion.

  Although the slit 9 is not formed in the central plane portion 28 on the bottom surface 11 side, as described above, for example, when the first male connector 100 (see FIG. 12) is inserted, the slit 10 is located on the top surface 10 side of the elastic valve body 3. When the portion between the front end portion of the slit 9 formed in the central plane portion 18 and the central plane portion 28 on the bottom surface 11 side is torn, the slit 9 is located on the bottom surface 11 side from the central plane portion 18 on the top surface 10 side. The center plane part 28 is communicated. In FIG. 3B, for convenience of explanation, the position of the slit 9 on the top surface 10 side is indicated by a broken line.

  Since the central protruding portion 29 protrudes outward from the central flat portion 28, the thickness in the thickness direction B of the central flat portion 18 on the top surface 10 side and the central flat portion 28 on the bottom surface 11 side is greater than The thickness in the thickness direction B of the central flat portion 18 and the central protrusion 29 on the top surface 10 side is thicker. In the case where the central protrusion 29 is not provided, when the elastic valve body 3 is excessively loaded when the male connector 100 is inserted or removed, or when the male connector 100 is repeatedly inserted and removed. In addition, there is a problem in that the longitudinal end portion on the bottom surface 11 side of the slit 9 communicated with each other is torn, but the longitudinal end portion of the slit 9 is reinforced by providing the central protrusion 29 to suppress the occurrence of the above problem. Is possible. In the present embodiment, when the elastic valve body 3 is viewed from the bottom surface 11 side, an annular central protruding portion 29 is formed so as to surround the central flat portion 28, and among them, the slit 9 formed on the top surface 10. The thickness corresponding to both sides in the longitudinal direction is formed to be the thickest. By adopting such a configuration, it is possible to suppress tearing of the end portion in the longitudinal direction of the slit 9 that penetrates, and to achieve both good male connector insertability of the elastic valve body 3 and maintenance of elastic restoring force. It becomes possible.

  In addition, an annular side wall portion 30 in which a surface substantially parallel to the thickness direction B and a surface inclined with respect to the thickness direction B are continuous in the circumferential direction E is continuous with the outer edge of the central projecting portion 29. Yes. Specifically, as shown in FIGS. 3B, 5A, and 5B, a portion of the side wall portion 30 that is located in a direction perpendicular to the longitudinal direction of the slit 9 with respect to the slit 9 (short axis direction in FIG. 3B). Is configured by a plane substantially parallel to the thickness direction B, and a portion of the side wall portion 30 that is located in the longitudinal direction of the slit 9 with respect to the slit 9 (long axis direction in FIG. 3B) is the top in the thickness direction B. It is comprised by the surface where the outer diameter in radial direction A increases gradually as it goes to the surface 10 side.

  As shown in FIG. 5, the peripheral portion bottom surface region 27 is continuous with the planar peripheral flat portion 31 extending in the radial direction A and the inner edge of the peripheral flat portion 31, and has a thickness substantially orthogonal to the peripheral flat portion 31. An annular side wall portion 32 extending in the vertical direction B. The side wall portion 32 of the present embodiment is configured to extend in the thickness direction B in the cross-sectional view of FIG. 5, but the inner diameter in the radial direction A gradually decreases as it proceeds to the top surface 10 side in the thickness direction B. It is good also as composition to do. With such a configuration, as will be described later, when the elastic valve body 3 is assembled, the locking projection 45 (see FIG. 6) of the bottom cap 8 is moved by the side wall portion 32 of the peripheral bottom surface region 27 to the center portion. A position in the radial direction A that is guided so as to press the side wall portion 30 so as to contact the side wall portion 30 of the bottom region 25 and is clamped by the clamping portion 48 (see FIG. 6) of the elastic valve body 3. The variation is suppressed. Further, the locking protrusion 45 of the bottom cap 8 is brought into contact with the side wall portion 30 of the central portion 13 by the side wall portion 32 of the peripheral portion bottom surface region 27 and further presses the side wall portion 30 radially inward. Since it is guided, when the elastic valve body 3 is clamped by the clamping portion 48 (see FIG. 6), the portion compressed by the clamping portion 48 flows to the insertion port 4 side, and the central portion 13 of the elastic valve body 3 It is possible to further suppress the occurrence of slack on the bottom surface 11 side. Details will be described later (see FIG. 11).

  The constricted portion bottom surface region 26 of the constricted portion 12 is an annular shape of a bottom annular groove 33 having the annular side wall portion 30 of the central bottom surface region 25 and the annular side wall portion 32 of the peripheral portion bottom surface region 27 described above as groove walls. This is the groove bottom 34. A locking projection 45 of the bottom cap 8 to be described later enters the bottom annular groove 33 and comes into contact with the annular groove bottom 34, and compresses and clamps the elastic valve body 3 together with the locking projection 41 of the bottom cap 7 to sandwich the clamping portion 48. (See FIG. 6).

  2 to 5, the outer edge in the radial direction A of the peripheral edge top surface region 17 on the top surface 10 of the elastic valve element 3, and the outer edge in the radial direction A of the peripheral edge bottom surface region 27 on the bottom surface 11. Are connected together with the top surface 10 and the bottom surface 11 by an annular side wall 35 constituting the outer wall of the elastic valve body 3. In addition, the side wall part 35 of this embodiment is an outer peripheral surface parallel to the thickness direction B, as shown in FIG. 4, FIG.

[Top cap 7]
FIG. 6 is an enlarged cross-sectional view showing a state where the elastic valve body 3 described above is sandwiched between the top cap 7 and the bottom cap 8. The configurations of the top cap 7, the bottom cap 8, and the holder 6 will be described below with reference to FIGS.

  As shown in FIG. 1, the top cap 7 includes a substantially cylindrical hollow cylinder portion 36 and a flange portion 37 provided on one end side of the hollow cylinder portion 36. As shown in FIG. 6, the upper surface (the upper surface in FIG. 6) that is the other end side of the hollow cylindrical portion 36 is perpendicular to the radial direction A of the elastic valve element 3 (in FIGS. 1 and 6, the insertion direction C of the male connector 100 is orthogonal). It is the planar extension part 38 extended in the same direction as the direction to do. The extending portion 38 includes a substantially circular edge 39 that defines one end of the insertion port 4 into which the male connector 100 is inserted from the outside. A thread 40 is formed on the outer peripheral surface of the hollow cylindrical portion 36 so as to be able to be screwed into a lock connector defined by ISO594. The flange portion 37 is a part molded integrally with the hollow cylindrical portion 36, and has a configuration in which the top cap 7 is held by the holder 6 when the flange portion 37 engages with the holder 6 described later.

  As shown in FIG. 6, in the vicinity of the edge 39 on the inner wall of the hollow cylindrical portion 36, the projection protrudes in the insertion direction C of the male connector 100, and the top annular groove 23 (FIG. 2, FIG. 2) of the elastic valve body 3 described above. 3 and FIG. 5), a locking projection 41 that compresses the elastic valve body 3 is provided together with the locking projection 45 of the bottom cap 8. An annular inner wall 42 of the top cap 7 formed between the edge 39 and the locking projection 41 is a side wall of the above-described central top surface region 15 of the elastic valve body 3 when the male connector 100 is not inserted. It contacts with the part 19 (refer FIGS. 2-5), and is comprised so that the male connector 100 may be contacted in the state (refer FIG. 12) in which the male connector 100 is inserted. That is, in a state where the male connector 100 is not inserted, the central top surface region 15 (see FIGS. 2 to 5) of the elastic valve body 3 is fitted into a substantially cylindrical space surrounded by the inner wall 42, and the male connector 100. In the state in which is inserted, the male connector 100 is fitted to the top cap 7 by the cylindrical inner wall 42. The inner wall 42 in the present embodiment has a cylindrical shape parallel to the insertion direction C. However, the inner wall 42 may have a tapered shape whose inner diameter gradually decreases in the insertion direction C according to the outer shape of the male connector 100. Good.

  Further, as shown in FIG. 6, in the state where the male connector 100 is not inserted, the central flat surface portion 18 extending in the radial direction A of the elastic valve body 3 in the central top surface region 15 of the elastic valve body 3. Is positioned on the opposite direction D side of the male connector insertion direction C from the edge 39. That is, a part of the central top surface region 15 protrudes in the reverse direction D side from the edge 39.

  With such a configuration, when a user such as a medical worker wipes off a chemical solution or the like adhering to the vicinity of the top surface 10 which is the outer wall of the elastic valve body 3, the elastic valve body 3 is connected to the inside of the connector 1 ( Even if the male connector 100 is slightly pushed in the insertion direction C), a step (inner wall 42 is externally connected) between the central top surface region 15 of the elastic valve body 3 and the edge 39 of the top cap 7 by this pushing. It is easy to wipe off the chemical solution and the like.

[Bottom cap 8]
As shown in FIG. 1, the bottom cap 8 is configured to include a substantially cylindrical hollow cylinder portion 43 and a flange portion 44 provided on one end side of the hollow cylinder portion 43, as with the top cap 7. The other end side of the hollow cylindrical portion 43 protrudes in the direction D opposite to the insertion direction C of the male connector 100 and enters the bottom annular groove 33 (see FIGS. 3B and 5) of the elastic valve body 3 described above. A locking projection 45 is provided to compress and clamp the elastic valve body 3 together with the locking projection 41 of the top cap 7 (see FIG. 6).

  The bottom cap 8 is held by the top cap 7 by ultrasonic bonding to the inner surface of the hollow cylindrical portion 36 of the top cap 7 and / or the lower surface of the flange portion 37 (the lower surface in FIG. 1). The position is fixed by supporting the flange portion 44 by a holder 6 described later.

[Holder 6]
As shown in FIG. 1, the holder 6 supports the top cap 7 and the bottom cap 8, and defines a hollow portion 71 therein. The holder 6 according to the present embodiment supports both the top surface cap 7 and the bottom surface cap 8 by directly contacting them. For example, the holder 6 does not contact the top surface cap 7 and directly contacts only the bottom surface cap 8. The top cap 7 may be in contact with and supported by the bottom cap 8. That is, the holder 6 may be configured to directly contact and support one of the top cap 7 and the bottom cap 8 and not directly contact the other. In addition, it is preferable to adhere | attach the members which contact directly, for example by ultrasonic bonding.

  When the male connector 100 is not inserted, the insertion port 4 (hollow part 70) defined by the inner wall of the top cap 7 and the inner wall of the bottom cap 8 and the hollow part 71 communicate with each other. Here, that the insertion port 4 and the hollow portion 71 “communicate” means that both spaces are connected, and not only that both spaces are directly connected but also through another space. It also means that they are connected. In addition, the insertion port 4 and the hollow part 71 in this embodiment shown in FIG. 1 are the structures connected directly.

  Although details will be described later, when the male connector 100 is inserted into the connector 1, the distal end portion 101 of the male connector 100 enters the hollow portion 71 or the vicinity thereof through the insertion port 4, The liquid flow path and the hollow portion 71 of the holder 6 communicate with each other.

  Further, as shown in FIG. 1, the holder 6 in this embodiment includes a substantially cylindrical outer cylinder portion 46 having a lock connector thread on the inner peripheral surface, and a hollow portion defined by the outer cylinder portion 46. However, the holder 6 is not limited to the shape of the holder 6, and various holders can be used, and can be appropriately changed according to the user's usage. For example, the connector 110 provided with the holder 60 as shown to FIG. 7A is mentioned. The holder 60 includes a holder main body 61 formed of a substantially cylindrical casing having a hollow portion therein, and a cylindrical upstream port portion 62 and a downstream port portion 63 protruding from the outer peripheral surface of the holder main body 61. The hollow inside the holder body 61 serves as a part of the liquid flow path 64 that reaches the downstream port part 63 from the upstream port part 62. A top cap 7 and a bottom cap 8 are supported on the outer wall of the holder 60. The holder 60 shown in FIG. 7A is different from the holder 6 in the shape of the internal liquid flow path and the shape of the liquid flow path, but the elastic valve body 3, the top cap 7 and the bottom cap 8 have been described above. The same can be used.

  Furthermore, in addition to the holder 60 described above, a holder 600 as shown in FIG. 7B can be used instead of the holder 6. FIG. 7B shows a three-way cock as the connector 120. The holder 600 in this three-way stopcock sandwiches the substantially cylindrical holder main body 602 that houses the cock 601 inside, the substantially cylindrical upstream port portion 603 provided on the outer wall of the holder main body 602, and the holder main body 602. The holder main body at a position different from the positions of the substantially cylindrical downstream port section 604 and the upstream port section 603 and the downstream port section 604 provided on the outer wall of the holder main body 602 at a position opposite to the upstream port section 603. And a branch port portion 605 provided on the outer wall of 602. A liquid channel 606 as shown by an arrow in FIG. 7B can be formed inside the holder 600. The elastic valve body 3, the top cap 7, and the bottom cap 8 are provided at the end of the branch port portion 605 of the holder 600 shown in FIG. 7B and supported by the holder 600.

  Here, in the present embodiment, the elastic valve body 3 is configured to be sandwiched between the top cap 7 and the bottom cap 8 constituting the cap 5, but is not limited to such a configuration. For example, the bottom cap 8 and the holder 6 are formed of a single member, the holder 6 itself has the function of the bottom cap 8, and the top face cap 7 constituting the cap 5 and the holder 6 are elastic valve bodies. 3 may be clamped. Further, the shape of the holder 60 may be used instead of the shape of the holder 6, and the bottom cap 8 and the holder 60 may be configured by a single member, or the shape of the holder 600 may be used instead of the shape of the holder 6. The bottom cap 8 and the holder 600 may be configured with a single member.

[Clamping portion 48 for clamping the elastic valve body 3]
Next, the structure in which the elastic valve body 3 is compressed and clamped by the top cap 7 and the bottom cap 8 will be described in detail.

  As shown in FIG. 6, the elastic valve body 3 is attached so as to close the hollow portion 70 (insertion port 4) defined by the hollow cylindrical portion 36 of the top cap 7 and the hollow cylindrical portion 43 of the bottom cap 8. ing. Specifically, the clamping portion 48 comes into contact with the top surface 10 where the slit 9 of the elastic valve body 3 is formed and the bottom surface 11 opposite to the top surface 10 to sandwich the elastic valve body 3. The position in the hollow part 70 of the valve body 3 is fixed. More specifically, the locking projection 41 of the top cap 7 enters the top surface annular groove 23 (see FIG. 5 and the like) of the elastic valve body 3, and the locking projection 45 of the bottom cap 8 forms the elastic valve body 3. The elastic valve body 3 enters the bottom annular groove 33 and compresses the elastic valve body 3 from the groove bottom 24 (see FIG. 5 and the like) of the top surface 10 and the groove bottom 34 of the bottom surface 11 to form a clamping portion 48. The position in the part 70 is fixed. The constricted portion 12 of the elastic valve body 3 in this embodiment has a thickness of about 1.0 mm in the thickness direction B before being sandwiched by the sandwiching portion 48. Is compressed until it becomes thin (for example, 0.2 to 0.3 mm) that cannot be elastically deformed in the thickness direction B. This amount of compression is an example, and depends on the shape and size of the elastic valve body. Can be changed as appropriate.

  Here, the clamping part 48 contacts the top surface side clamping part 49 that contacts the top surface 10 of the elastic valve element 3 and the bottom surface 11 of the elastic valve element 3, and the elastic valve element 3 together with the top surface side clamping part 49. It is comprised by the bottom face side clamping part 50 to clamp, and when the elastic valve body 3 is seen from the top | upper surface 10 side, the clamping part 48 is provided in the substantially circular shape so that the slit 9 may be surrounded. In addition, the top surface side clamping part 49 in this embodiment is a front-end | tip part of the latching protrusion 41 of the top-surface cap 7, and the bottom face side clamping part 50 is a front-end | tip part of the latching protrusion 45 of the bottom surface cap 8. FIG. In addition, when the elastic valve body 3 is viewed from the top surface 10 side, the top surface side clamping portion 49 and the bottom surface side clamping portion 50 are arranged on a virtual plane when the elastic valve body 3 is viewed from the top surface 10 side. It means the case where it is projected, and does not mean whether or not it can actually be seen.

  When viewed from the top surface 10 side, the elastic valve body 3 is sandwiched by the sandwiching portion 48 and the constricted portion 12 sandwiched by the sandwiching portion 48 and the inner side in the radial direction A from the constricted portion 12. The center part 13 located and the peripheral part 14 located in the outer side in radial direction A rather than the narrow part 12 are provided.

  In this state, the peripheral edge 14 of the elastic valve body 3 is surrounded by a part of the inner wall of the top cap 7 and a part of the outer wall of the bottom cap 8. Details of this will be described later (see FIG. 8 and the like).

  Moreover, when the elastic valve body 3 is seen from the top surface 10 side, the clamping part 48 in this embodiment is provided over the circumferential direction E (refer FIG. 3) of the elastic valve body 3, for example, It is also possible to adopt a configuration in which only a part of the circumferential direction E is provided, such as being arranged at predetermined intervals in the circumferential direction E by comb-like protrusions. However, if the clamping portion 48 is provided in the entire circumferential direction E as in the present embodiment and is configured to contact the top surface 10 and the bottom surface 11 of the elastic valve body 3 in the entire circumferential direction E, the male connector is inserted and removed. It can further suppress that the narrow part 12 and the peripheral part 14 of the elastic valve body 3 move to the insertion port 4 side with respect to repetition of these.

  Furthermore, the clamping portion 48 of the present embodiment is configured by the housing 2. Specifically, the sandwiching portion 48 of the present embodiment is configured by the distal end portion of the locking projection 41 of the top cap 7 and the distal end portion of the locking projection 45 of the bottom cap 8. The form of is not limited to this. For example, the clamping unit may be configured by a member other than the members configuring the housing. Further, even when the housing constitutes the clamping portion, the configuration is not limited to the configuration of the clamping portion 48 in the present embodiment. For example, the top surface side member in which the housing is located on the top surface side of the elastic valve body And the bottom surface side member positioned on the bottom surface side of the elastic valve body, and the top surface side member and the bottom surface side member are positioned between and directly contact the top surface and the bottom surface of the elastic valve body. And a contact member that sandwiches the elastic valve body, and the contact member may constitute the sandwiching portion. In such a case, the top surface side member and the bottom surface side member are in direct contact with the top surface and bottom surface of the elastic valve body because the sandwiching portion is formed by sandwiching the contact member between the top surface side member and the bottom surface side member. It becomes the composition which does not.

[Volume of peripheral edge 14 of elastic valve element 3]
Next, the elastic valve body 3 is held by the holding portion 48 in the housing 2, in other words, the top surface side holding portion 49 and the bottom surface side holding portion constituted by the locking projections 41 and 45 of the top cap 7 and the bottom cap 8. 50, the relationship between the volume of the peripheral edge portion 14 in the state of being sandwiched and the volume of the peripheral edge portion 14 in a state in which the elastic valve body 3 is not sandwiched by the sandwiching portion 48 will be described.

  The “state in which the elastic valve body is clamped by the clamping portion” means a state in which the elastic valve body is assembled in the connector and can be used as a connector by a user such as a medical worker as shown in FIG. Means. Further, “the state in which the elastic valve body is not clamped by the clamping portion” means a state in which the elastic valve body is not assembled in the connector, that is, for example, a single elastic valve body as shown in FIGS. Means state.

  In the present embodiment, the volume V1 of the peripheral edge 14 when the elastic valve body 3 is clamped by the clamping section 48 is the volume of the peripheral edge 14 when the elastic valve body 3 is not clamped by the clamping section 48. Greater than V2.

  First, a connector 200 as a comparative example of the connector 1 according to the present embodiment will be described. FIG. 14 shows a connector 200 as a comparative example. The connector 200 is different from the connector 1 according to the present embodiment in that the volume of the peripheral portion is not changed before and after the elastic valve body is sandwiched by the sandwiching portion. 14A shows a state where the elastic valve body 203 of the connector 200 is not clamped by the clamping part 248, and FIG. 14B shows a state where the elastic valve body 203 is clamped by the clamping part 248. 14A indicates the position of the bottom cap 208 in a state where the elastic valve body 203 is sandwiched by the sandwiching portion 248.

  As shown in FIG. 14, the peripheral edge 214 of the elastic valve body 203 in a state where the elastic valve body 203 is not clamped by the clamping portion 248 is accommodated in a state where the elastic valve body 203 is clamped by the clamping portion 248. Space 251 (in FIG. 14A, a space defined by a solid top cap 207 and a broken bottom cap 208, and in FIG. 14B, a space defined by a solid top cap 207 and a broken bottom cap 208. Already larger than). That is, when changing from the state shown in FIG. 14A in which the elastic valve body 203 is not held by the holding portion 248 to the state shown in FIG. 14B held in the holding portion 248, the peripheral portion 214 of the elastic valve body 203 Will be compressed by the wall surface which divides the accommodation space 251, and a volume will reduce.

  Therefore, due to the compression of the clamping portion 248, a part of the elastic valve body 203 pushed out in the radial direction A from the position of the constricted portion 212 is easily pushed out to the center portion 213 side instead of the peripheral edge portion 214 side. There is a possibility that the slack on the bottom surface 211 side of the central portion 213 occurs as shown in FIG. When there is a slack as shown in FIG. 14B, the force for pulling the central portion 213 of the elastic valve body 203 toward the peripheral edge 214 in the radial direction A is weaker than that in the configuration without the slack. When the removal is repeatedly performed, the central portion 213 of the elastic valve body 203 may be extended. If the central portion 213 of the elastic valve body 203 extends, the central portion 213 may not be restored to the initial position even if the male connector is removed.

  14B, when the male connector 100 as shown in FIG. 12 is inserted into the connector 200, it is sandwiched between the male connector 100 and the inner walls of the top cap 207 and the bottom cap 208. The volume of the elastic valve body 203 is increased. As a result, the insertion resistance of the male connector 100 increases, and the insertability of the male connector may be reduced. Furthermore, scratches may be formed on the elastic valve body 203. If scratches are formed on the elastic valve body 203, the worn valve body piece may become a foreign substance, and the restoring force of the elastic valve body 203 is reduced. There is a risk.

  On the other hand, as described above, the connector 1 according to the present embodiment has a peripheral edge of the elastic valve body 3 when the elastic valve body 3 changes from a state where it is not sandwiched by the sandwiching portion 48 to a state where it is sandwiched. Since the configuration is such that the volume of the portion 14 is increased, unlike the connector 200 as the comparative example described above, the slack on the bottom surface 11 side of the central portion 13 hardly occurs. Hereinafter, the volume change of the peripheral part 14 of the elastic valve body 3 in the connector 1 as this embodiment is demonstrated in detail.

  FIG. 8 shows the volume of the peripheral portion 14 of the elastic valve body 3 between the state in which the elastic valve body 3 is held by the holding portion 48 and the state in which the elastic valve body 3 is not held in the connector 1 as the present embodiment. It is a figure which shows a change. Specifically, FIG. 8A shows a state immediately before the elastic valve body 3, the top cap 7 and the bottom cap 8 are assembled, that is, the elastic valve body 3 is not clamped by the clamping portion 48, and FIG. The state in which the valve body 3 is assembled in the connector 1, that is, the state in which the elastic valve body 3 is clamped by the clamping portion 48 is shown.

  As shown in FIGS. 8A and 8B, when the constricted portion 12 of the elastic valve body 3 is compressed by the sandwiching portion 48, a part of the volume of the elastic valve body 3 moves outward in the radial direction A. 3, the volume of the peripheral edge portion 14 is increased compared to the state before the constricted portion 12 is compressed by the clamping portion 48.

  Specifically, as shown in FIG. 8, the housing 2 defines an annular accommodation space 51 that can accommodate the peripheral edge portion 14 of the elastic valve element 3. More specifically, the housing 2 surrounds the periphery of the elastic valve body 3 in the radial direction A outside the peripheral edge portion 14 in the radial direction A in a state where the elastic valve body 3 is clamped by the clamping portion 48. The housing space 51 includes an inner wall portion 52, and has a cross section orthogonal to the radial direction A (a cross section parallel to the thickness direction B and a cross section parallel to the male connector insertion direction C). The top surface side connection part which connects the surface side clamping part 49, the bottom face side clamping part 50, one end of the inner wall part 52 (in FIG. 8, one end on the opposite direction D side of the insertion direction C of the male connector) and the top surface side clamping part 49. The portion 53 is divided by the other end of the inner wall portion 52 (one end on the insertion direction C side in FIG. 8) and the bottom surface side connecting portion 54 that connects the bottom surface side sandwiching portion 50.

  FIG. 8A is a view showing a state where the elastic valve body 3 is not clamped by the clamping portion 48, but the locking projection 45 of the bottom cap 8 in a state where the elastic valve body 3 is clamped by the clamping portion 48. The position is indicated by a broken line. In the present embodiment, as shown in FIG. 8A, the outer wall of the peripheral edge 14 of the elastic valve body 3 that is not sandwiched by the sandwiching portion 48 and the state where the elastic valve body 3 is sandwiched by the sandwiching portion 48. When looking at the wall surface defining the accommodation space 51 (in FIG. 8A, a part of the inner wall of the solid top cap 7 and a part of the outer wall of the bottom cap 8 shown by the broken line), a gap 55 is provided between them. Yes. In other words, the volume V2 (see FIG. 8A) of the peripheral edge 14 in a state where the elastic valve body 3 is not clamped by the clamping portion 48 is accommodated in a state where the elastic valve body 3 is clamped by the clamping portion 48. It is smaller than the volume V3 of the space 51 (see FIG. 8B).

  Therefore, when the state shown in FIG. 8A is changed to the state where the elastic valve body 3 shown in FIG. 8B is held by the holding portion 48, the locking projection 41 of the top cap 7 and the locking projection of the bottom cap 8 The constricted portion 12 is compressed and deformed by the compression of 45, and a part of the elastic valve body 3 moves so as to be pushed out from the position of the constricted portion 12 toward the peripheral edge 14 in the radial direction A. That is, if the volume relationship of V2 <V3 is set as in the present embodiment, a part of the elastic valve body 3 moving from the constricted portion 12 is compared with the peripheral portion 14 as compared with the configuration in which the volume relationship of V2 ≧ V3. It can be easily moved to the side. Therefore, when the state shown in FIG. 8A is changed to the state shown in FIG. 8B, that is, when the elastic valve body 3 is assembled to the connector 1, the elastic valve body 3 is moved from the position of the constricted portion 12 toward the central portion 13. The movement of a part of the center portion 13 prevents the back surface 11 side of the central portion 13 from being loosened.

  In other words, the peripheral edge portion 14 in a state in which the elastic valve body 3 is held by the holding portion 48 is moved by pushing out a part of the elastic valve body 3 from the position of the constricted portion 12 by the compression of the holding portion 48. Therefore, the volume V1 of the peripheral edge 14 in a state where the elastic valve body 3 is held by the holding portion 48 is larger than the volume V2 of the peripheral edge 14 when not held by the holding portion 38. growing.

  Note that the peripheral edge portion 14 of the elastic valve body 3 is a portion located on the outer side than the position held by the holding portion 48 when the elastic valve body 3 is viewed from the top surface 10 side. Here, the “position held by the holding portion” of the elastic valve body 3 means a position held by the top surface side holding portion 49 and the bottom surface side holding portion 50 of the elastic valve body 3. Therefore, the “peripheral edge portion of the elastic valve body” is more than the line segment connecting the most radially outer position of the top surface side clamping portion and the most radially outer position of the bottom surface side clamping portion. Means a portion located outside in the radial direction.

  Specifically, the peripheral edge portion 14 of the elastic valve body 3 in the present embodiment is a cross-sectional view shown in FIGS. 1 and 6 (in the longitudinal direction of the slit 9 when the elastic valve body 3 is viewed from the top surface 10 side). The cross section passing through the point and parallel to the thickness direction B of the elastic valve body 3), with the elastic valve body 3 being sandwiched by the sandwiching section 48, the most radial direction of the top surface side sandwiching sections 49. A radial direction A with respect to an imaginary line (see a two-dot chain line in FIG. 8B) connecting a point P located outside A and a point Q located most outside the radial direction A in the bottom-side clamping part 50. It becomes the outside part.

  The position clamped by the clamping part 48 in the elastic valve body 3 can be specified by the above-described method, whereby the peripheral edge part 14 of the elastic valve body 3 can also be specified. The peripheral edge 14 in a state where the elastic valve body 3 is not assembled in the connector 1 is specified by specifying the position where the elastic valve body 3 is clamped by the clamping section 48 when the elastic valve body 3 is assembled in the connector 1. (Refer to the two-dot chain line in FIG. 8A).

  In this way, the volume of the peripheral edge portion 14 of the elastic valve body 3 can be compared between a state where the elastic valve body 3 is held by the holding portion 48 and a state where the elastic valve body 3 is not held.

  Next, the peripheral edge 14 and the accommodation space 51 of the elastic valve body 3 in this embodiment shown in FIG. 8 will be described in more detail. In the present embodiment, as shown in FIG. 8B, even when the elastic valve body 3 is sandwiched by the sandwiching portion 48, the outer wall of the peripheral edge portion 14 of the elastic valve body 3 and the wall surface that partitions the accommodation space 51. A gap 55 is maintained in between. In other words, even when the elastic valve body 3 is sandwiched by the sandwiching portion 48, the gap 55 is partitioned by the inner wall of the housing 2 and the outer wall of the peripheral edge portion 14 that partition the accommodation space 51. Yes.

  If the constricted portion 12 of the elastic valve body 3 is compressed and held by the holding portion 48 and the volume of the peripheral portion 14 of the elastic valve body 3 is increased, the elastic valve body 3 is held by the holding portion 48. In this state, the entire outer wall of the peripheral edge portion 14 of the elastic valve body 3 may be in contact with the entire wall surface defining the accommodating space 51, and there may be no gap 55 between the two. However, even if the elastic valve body 3 is sandwiched by the sandwiching portion 48 as in the present embodiment, the space between the outer wall of the peripheral edge portion 14 of the elastic valve body 3 and the wall surface defining the accommodation space 51 is not limited. It is preferable that the gap 55 is maintained.

  In a state where the elastic valve body 3 is clamped by the clamping portion 48, the entire outer wall of the peripheral edge portion 14 of the elastic valve body 3 is in contact with the entire wall surface partitioning the storage space 51, and the peripheral edge portion 14 is in the storage space 51. In the configuration in which the wall surface that divides the space is pressed, in the process of holding and compressing the elastic valve body 3 by the holding portion 48, the volume of the peripheral edge portion 14 of the elastic valve body 3 is increased so that the accommodating space 51 is formed by the peripheral edge portion 14. It is filled. That is, before the clamping of the elastic valve body 3 by the clamping part 48 (compression of the constricted part 12) is completed (before the assembly of the elastic valve body 3 into the connector 1 is completed), the peripheral edge 14 of the elastic valve body 3 Is compressed and deformed from the entire wall surface defining the accommodating space 51, and a reaction force is applied from the wall surface. If the holding of the elastic valve element 3 by the holding part 48 is continued in this state, a part of the elastic valve element 3 is pushed out toward the central part 13 in the radial direction A by the reaction force from the wall surface defining the accommodating space 51. It will be easier. That is, in the state where the elastic valve body 3 is sandwiched by the sandwiching portion 48, the gap 55 is maintained between the outer wall of the peripheral edge portion 14 and the wall surface that defines the accommodating space 51. In this case, it is possible to further suppress the slack on the bottom surface 11 side of the central portion 13 as compared with the configuration without the gap 55 in the same state.

  Next, the position of the gap 55 with respect to the peripheral edge portion 14 of the elastic valve body 3 in a state where it is not sandwiched by the sandwiching portion 48 will be described in detail. In the present embodiment, as shown in FIG. 8A, an inner wall portion 52 that surrounds the periphery of the elastic valve body 3 in the radial direction A outside the peripheral edge portion 14 in the radial direction A, and the peripheral edge portion 14 of the elastic valve body 3. A gap 55 is provided between the outer wall and the outer wall. This is because when the constricted portion 12 of the elastic valve body 3 is compressed by the clamping portion 48, a part of the elastic valve body 3 is pushed out from the position of the constricted portion 12 toward the outside in the radial direction A, and the side wall portion of the peripheral edge portion 14. This is because 35 tends to bulge outward in the radial direction A. In particular, as in the present embodiment, when the width in the radial direction A of the peripheral edge portion 14 of the elastic valve body 3 is relatively thin (for example, 1 mm or less), the elastic valve body 3 is compressed by the clamping portion 48. When sandwiched, the side wall portion 35 of the peripheral edge portion 14 is more likely to bulge outward in the radial direction A, so that a gap is provided between the inner wall portion 52 and the side wall portion 35 of the peripheral edge portion 14 of the elastic valve body 3. It is beneficial.

  In this embodiment, as shown in FIG. 8B, a part of the side wall 35 of the peripheral edge 14 and a part of the inner wall 52 are in contact with each other in a state where the elastic valve body 3 is held by the holding part 48. Although it is the structure to perform, the space | gap 55 is still provided between the peripheral part 14 and the inner wall part 52. FIG. While the elastic valve body 3 is sandwiched by the sandwiching portion 48, the outer wall of the peripheral edge portion 14 and the entire area of the inner wall portion 52 may be in contact with each other, and there may be no gap 55 between them. In the same state, the structure shown in this embodiment in which the gap 55 is maintained is preferable.

  Furthermore, in this embodiment, since the width in the radial direction A of the peripheral edge portion 14 is relatively thin, the elastic valve body of the side wall portion 35 of the peripheral edge portion 14 is compressed by the clamping portion 48 of the elastic valve body 3. The portion located outside the radial direction A with respect to the three constricted portions 12 (the portion located at the position of the constricted portion 12 in the thickness direction B) bulges outward most. In this embodiment, this portion of the side wall portion 35 is configured to come into contact with a part of the inner wall portion 52 in a state where the elastic valve body 3 is held by the holding portion 48. It is more preferable that this portion also be configured not to contact the inner wall portion 52. Such a configuration can be easily realized, for example, by using a top cap 700 having a shape different from that of the top cap 7 in the present embodiment as shown in FIG.

  The top cap 700 of the connector 130 shown in FIG. 9 includes an inner wall portion 520 in a cross section parallel to the thickness direction B of the elastic valve body 3, similarly to the top cap 7. However, the inner wall portion 52 of the top cap 7 in the present embodiment is a straight line substantially parallel to the thickness direction B in the cross-sectional views of FIGS. 1 and 6, whereas the top cap 700 shown in FIG. The inner wall portion 520 has a curved shape protruding outward in the radial direction A so that the inner diameter becomes maximum at a position outside the radial direction A with respect to the constricted portion 12 in the same cross-sectional view.

  By adopting such a configuration, the inner diameter of the inner wall portion 520 of the top cap 700 is maximized at a position outside the radial direction A with respect to the constricted portion 12. Therefore, in a state where the elastic valve body 3 is sandwiched by the sandwiching portion 48, a portion of the side wall portion 35 of the peripheral portion 14 that is located outside the radial direction A with respect to the constricted portion 12 of the elastic valve body 3 is It is possible to prevent contact with the inner wall portion 520.

  As shown in FIG. 9, the inner wall portion 520 of the top cap 700 has a curved shape protruding outward in the radial direction A so that the inner diameter becomes maximum at a position outside the radial direction A with respect to the constricted portion 12. However, any portion of the side wall portion 35 of the peripheral edge portion 14 that is positioned outside the radial direction A with respect to the constricted portion 12 may not be in contact with the inner wall portion, as shown in FIG. The configuration of the inner wall portion 520 of the top cap 700 is not limited.

  Further, in the connectors 1 and 130 shown in FIGS. 8 and 9, a part of the side wall portion 35 of the peripheral edge portion 14 is one of the inner wall portions 52 and 520 in a state where the elastic valve body 3 is held by the holding portion 48. Although the structure which contacts a part is shown, it is good also as a structure which the side wall part 35 does not contact the inner wall parts 52 and 520 at all.

  As described so far, in the connector 1 according to the present embodiment, the volume of the peripheral portion 14 changes before and after the elastic valve body 3 is held by the holding portion 48. This change in volume is caused by the elasticity in the radial direction A. This can also be explained as a change in the outer diameter of the valve body 3. That is, the maximum outer diameter X1 of the elastic valve body 3 in a state where the elastic valve body 3 is held by the holding portion 48 is larger than the maximum outer diameter X2 of the elastic valve body 3 in a state where the elastic valve body 3 is not held by the holding portion 48. (See FIGS. 8A and 8B). The “maximum outer diameter of the elastic valve element” means the outer diameter of the elastic valve element when the elastic valve element is projected on a virtual plane when the elastic valve element is viewed from the top surface side.

  Further, as described above, when the elastic valve body 3 is sandwiched and compressed by the sandwiching portion 48, the side wall portion 35 of the peripheral edge portion 14 is positioned outside in the radial direction A with respect to the constricted portion 12 of the elastic valve body 3. The portion is relatively easy to bulge (see FIG. 9). Therefore, in addition to the relationship between the maximum outer diameters X1 and X2 before and after the elastic valve body 3 is sandwiched by the sandwiching portion 48, the elastic valve body 3 is parallel to the radial direction A including the constricted portion 12 sandwiched by the sandwiching portion 48. The volume of the peripheral portion 14 is determined by the outer diameter of the elastic valve body 3 in the cross section and the outer diameter of the elastic valve body 3 in the cross section parallel to the radial direction A including the constricted portion 12 in a state where the elastic valve body 3 is not held by the holding portion 48. It is also possible to explain the change.

  Specifically, the constricted portion 12 in a state where the outer diameter of the elastic valve body 3 in a cross section parallel to the radial direction A including the constricted portion 12 in a state of being sandwiched by the sandwiching portion 48 is not sandwiched by the sandwiching portion 48. Is larger than the outer diameter of the elastic valve body 3 in a cross section parallel to the radial direction A (see FIGS. 8A and 8B).

  Further, the volume change of the peripheral portion 14 before and after the elastic valve body 3 is clamped by the clamping portion 48 can also be expressed as a relationship between the inner diameter of the inner wall portion 52 and the outer diameter of the elastic valve body 3. That is, the maximum inner diameter X3 of the inner wall portion 52 is larger than the maximum outer diameter X2 of the elastic valve body 3 in a state where the elastic valve body 3 is not clamped by the clamping portion 48 (see FIG. 8A).

  In addition, since the inner wall part 52 of this embodiment is substantially cylindrical shape, the inner diameter of the inner wall part 52 is substantially equal at an arbitrary position in the male connector insertion direction C, and this inner diameter is the maximum inner diameter X3 of the inner wall part 52.

  Further, as described above, when the elastic valve body 3 is sandwiched and compressed by the sandwiching portion 48, the side wall portion 35 of the peripheral edge portion 14 is positioned outside in the radial direction A with respect to the constricted portion 12 of the elastic valve body 3. The portion is relatively easy to bulge (see FIG. 9). Therefore, in addition to the relationship between the maximum inner diameter X3 of the inner wall portion 52 and the maximum outer diameter X2 of the elastic valve body 3, the inner wall in a cross section parallel to the radial direction A including the constricted portion 12 held by the holding portion 48 It is also possible to represent the volume change of the peripheral portion 14 by the inner diameter of the portion 52 and the outer diameter of the elastic valve body in a cross section parallel to the radial direction A including the constricted portion 12 that is not sandwiched by the sandwiching portion 48. It is. Specifically, the inner diameter of the inner wall portion 52 in a cross section parallel to the radial direction A including the constricted portion 12 that is sandwiched by the sandwiching portion 48 includes the constricted portion 12 that is not sandwiched by the sandwiching portion 48. It becomes a structure larger than the outer diameter of the elastic valve body in a cross section parallel to the radial direction A (see FIGS. 8A and 8B).

  As shown in FIG. 8B, in a state where the elastic valve body 3 is held by the holding portion 48, the inner wall portion 52 comes into contact with the outer wall of the peripheral edge portion 14 of the elastic valve body 3, thereby The maximum inner diameter X3 and the maximum outer diameter X1 of the elastic valve body 3 may be configured to be equal. However, the maximum inner diameter X3 of the inner wall portion 52 is elastic when the elastic valve body 3 is held by the holding portion 48. It is preferable that the configuration be larger than the maximum outer diameter X1 of the valve body 3.

  As described above, the gap 55 in the accommodation space 51 is preferably provided on the outer side in the radial direction A with respect to the peripheral portion 14 as shown in FIG. 8A, but the viewpoint of suppressing the slack on the bottom surface 11 side of the central portion 13. Then, in addition to this position, it is more preferable that the elastic valve body 3 is also provided outside the thickness direction B with respect to the peripheral edge portion 14.

  When the elastic valve element 3 is clamped by the clamping part 48, a part of the elastic valve element 3 is pushed out from the position of the constricted part 12 toward the peripheral part 14, but the part pushed out to the peripheral part 14 side is the peripheral part. This is because, in addition to the increase in the outer diameter in the radial direction A of the portion 14, the increase in the thickness in the thickness direction B of the peripheral portion 14 can be affected. Therefore, for example, as shown in FIG. 10, the elastic valve body 3 has a length T <b> 1 in the thickness direction B of the peripheral edge portion 14 in a state where the elastic valve body 3 is not clamped by the clamping portion 48. In the thickness direction B of the accommodation space 51 in a state where the storage space 51 is sandwiched by the sandwiching portion 48 (the top surface side connecting portion 53 of the solid surface top cap 7 and the bottom surface side of the bottom surface cap 8 shown by the broken line in FIG. 10) The length is preferably shorter than the length in the thickness direction B sandwiched between the connecting portions 54.

  Here, “the length in the thickness direction of the peripheral portion when the elastic valve body is not sandwiched by the sandwiching portion” means the thickness of the peripheral portion when the elastic valve body is not sandwiched by the sandwiching portion. It means the extended length in the direction. In the present embodiment, as shown in FIG. 10A, the peripheral flat surface 21 of the peripheral top surface region 17 and the peripheral flat surface of the peripheral bottom surface region 27 in a state where the elastic valve element 3 is not held by the holding portion 48. It is the extending length in the thickness direction B sandwiched between the portions 31.

  In addition, “the length in the thickness direction of the accommodation space when the elastic valve body is clamped by the clamping portion” means the thickness direction of the storage space when the elastic valve body is clamped by the clamping portion It means the space width in. In the present embodiment, as shown in FIG. 10A, the thickness direction sandwiched between the top surface side coupling portion 53 and the bottom surface side coupling portion 54 in a state where the elastic valve body 3 is sandwiched by the clamping portion 48. The space width in B. More specifically, in the top surface side connection portion 53, the point located closest to the direction D opposite to the insertion direction C of the male connector 100, and the bottom surface side connection portion 54 is located closest to the insertion direction C. The space width in the thickness direction B defined by the point.

  When the above-described relationship of T1 <T2 is established, the peripheral edge of the elastic valve body 3 is changed from the state of FIG. 10A to the state of FIG. 10B where the elastic valve body 3 is sandwiched and compressed by the sandwiching portion 48. The portion 14 can be increased in thickness in the thickness direction B. In other words, the elastic valve body 3 is clamped by the clamping part 48 at a length T3 (see FIG. 10B) in the thickness direction B of the peripheral edge 14 in a state where the elastic valve element 3 is clamped by the clamping part 48. It is possible to make the length longer than the length T1 in a state where it is not.

  When the state is changed from a state where the elastic valve body 3 is not held by the holding unit 48 (for example, the state shown in FIG. 10A) to a state where the elastic valve body 3 is held by the holding unit 48 (for example, the state shown in FIG. 10B). The peripheral portion 14 of the elastic valve body 3 may be configured to increase the thickness in the thickness direction B. When the elastic valve body 3 is sandwiched by the sandwiching portion 48, the peripheral edge of the elastic valve body 3 is The structure which the part 14 and the whole region of the top | upper surface side connection part 53 and / or the whole region of the bottom face side connection part 54 may contact may be sufficient.

  However, as shown in FIG. 10, in the state where the elastic valve body 3 is held by the holding portion 48, there is still a gap between the peripheral edge portion 14 and the top surface side connecting portion 53 and / or the bottom surface side connecting portion 54. It is preferable to have a configuration provided. By doing in this way, it is suppressed that the peripheral part 14 of the elastic valve body 3 receives reaction force by the top | upper surface side connection part 53 and / or the bottom face side connection part 54, and slackness is carried out to the bottom face 11 side of the center part 13. It becomes difficult to form.

  Furthermore, instead of the elastic valve body 3 in the present embodiment, an elastic valve body 300 as shown in FIG. 11 can be used. As shown in FIG. 11, the elastic valve body 300 has a side wall portion 22 in the peripheral edge top surface region 17 where the side wall portion 22 is perpendicular to the peripheral flat surface portion 21 of the peripheral edge top surface region 17 (the connector 1 The inner diameter in the radial direction A gradually decreases as the male connector is inserted in the male connector insertion direction C), and the side wall 320 of the peripheral bottom surface region 27 is the peripheral edge of the peripheral bottom surface region 27. The inner diameter in the radial direction A gradually decreases as the top surface 10 side in the thickness direction B perpendicular to the flat surface portion 31 (in the state of being fixed in the connector 1, the direction D is opposite to the male connector insertion direction C). ing. When such an elastic valve body 300 is used, when the elastic valve body 300, the top cap 7, and the bottom cap 8 are assembled, the locking protrusion 41 of the top cap 7 is formed by the side wall portion 19 by the side wall portion 19. Therefore, the surface of the top cap 7 on the side of the insertion port 4 of the locking projection 41 and the side wall portion 19 of the elastic valve body 300 are in close contact with each other. Further, the locking projection 45 of the bottom cap 8 is guided by the side wall portion 320 so as to press the side wall portion 30 inward in the radial direction A. The surface and the side wall 30 of the elastic valve body 3 are in close contact (see FIG. 6 and the like).

  As described above, when the elastic valve body 300 is compressed by the clamping portion 48 by bringing the surfaces of the locking protrusions 41 and 45 on the side of the insertion port 4 into close contact with the outer wall of the elastic valve body 300, A part of the elastic valve body 300 pushed out from the outer periphery of the elastic valve body 300 can be easily moved toward the peripheral edge 14 side in the radial direction A. As a result, the looseness of the elastic valve body 300 on the bottom surface 11 side of the central portion 13 can be achieved. Can be further suppressed.

  In the present embodiment, the inner wall portion 52, the top surface side clamping portion 49, and the top surface side coupling portion 53 are part of the inner wall of the top surface cap 7, and the bottom surface side clamping portion 50 and the bottom surface side coupling portion 54. Is a part of the outer wall of the bottom cap 8, but is not limited to the configuration of the present embodiment in which the accommodation space 51 is defined by only two members, the top cap 7 and the bottom cap 8. It is also possible to configure 52 by the bottom cap 8 or other members. Further, for example, by combining three or more members, the inner wall portion 52, the top surface side clamping portion 49, the bottom surface side clamping portion 50, the top surface side coupling portion 53, and the bottom surface side coupling portion 54 are configured. Also good.

[Connector 1 with male connector 100 inserted]
So far, the connector 1 in a state where the male connector 100 is not inserted has been mainly described. Below, each member of the connector 1 at the time of male connector insertion is demonstrated.

  FIG. 12 shows a state in which the male connector 100 is inserted into the connector 1. FIG. 12 shows a configuration using the above-described holder 60 instead of the holder 6, but the holder 6 can also be used. The elastic valve body 3, the top cap 7, and the bottom cap 8 are the same as those of the connector 1 described above.

  When the male connector 100 is inserted into the connector 1, the distal end portion 101 of the male connector 100 is elastically deformed so as to push the elastic valve body 3 into the connector 1, and the liquid flow path in the holder main body 61 is passed through the slit 9 that penetrates. 64 or in the vicinity thereof.

  The elastic valve body 3 is elastically deformed by the insertion of the male connector 100, enters between the inner wall of the bottom cap 8 and the outer wall of the male connector 100, and comes into close contact with the outer surface of the male connector 100. Thereby, it is suppressed that a liquid leaks from the connector 1 outside.

  The distal end portion 101 of the male connector 100 abuts against the positioning portion 65 formed on the upper surface of the holder main body 61 with the elastic valve body 3 interposed therebetween, and the male connector 100 is positioned in the insertion direction C. Although the elastic valve element 3 is sandwiched between the outer surface of the male connector 100 and the inner wall of the bottom cap 8, the elastic valve element 3 is provided with a slit 9 penetrating the inner surface of the male connector 100. The liquid flow path is in communication with the liquid flow path 64 through the slit 9.

[Infusion set 80 including connector 1]
Finally, the infusion set 80 provided with the connector 1 which is one embodiment of this invention is demonstrated using FIG. Here, the infusion set 80 including the connector 1 using the holder 60 described above will be described. However, the shape of the holder can be appropriately changed according to the use application of the infusion set, and the connector having the holder 6 and the holder 600 described above. It is also possible to constitute an infusion set comprising

  As shown in FIG. 13, an infusion set 80 includes a bottle needle 81 inserted into an infusion bag containing liquid, a first tube 82 connected to the base of the bottle needle 81 and forming a liquid flow path, A drip tube 83 connected to the liquid flow channel downstream side of the tube 82, a second tube 84 connected to the drip tube 83 and forming a liquid flow path for the liquid discharged from the drip tube 83, A clamp 85 attached to the outer peripheral surface of the tube 84 and capable of adjusting a flow rate of the liquid passing through the second tube 84, and an end of the second tube 84 positioned on the downstream side of the liquid flow path from the installation position of the clamp 85. A connector 1 having a holder 60 having a first tube connection port 62 connected to the first portion, a third tube 86 connected to the second tube connection port 63 of the connector 1 and forming a liquid flow path, 3rd tube A locking connector 87 which is connected to the downstream end of the liquid channel 6, and a.

  In this infusion set 80, the third tube 86 is configured to connect the connector 1 and the lock connector 87, but another connector 1 is added between the connector 1 and the lock connector 87, It is good also as a structure which adds the tube to connect. In addition, the number of the clamps 85 can be added or arranged at another position, and the constituent elements of the infusion set 80 and the positions of the constituent elements can be appropriately changed by those skilled in the art according to the intended use of the user. And can be combined, and is not limited to the configuration of the infusion set 80.

  Moreover, it is preferable that the 1st-3rd tubes 82, 84, 86 and each component connected to these tubes are connected with a lock connector.

  Since the infusion set 80 includes the connector 1, it is possible to supply a liquid other than the liquid from the infusion bag to which the bottle needle 81 is connected to the infusion line through the connector 1. There is no need to provide a different infusion line.

  The present invention is not limited to the configuration specified in the above-described embodiment, and various modifications can be made without departing from the scope of the invention described in the claims.

  The “top surface” of the elastic valve body 3 used here means a surface at least a part of which is exposed to the outside when the elastic valve body 3 is assembled in the connector 1. The “top cap” means a cap that contacts the “top” of the elastic valve element 3. Similarly, the “bottom cap” means a cap that contacts the bottom surface of the elastic valve body 3.

  The present invention relates to a connector and an infusion set, and more particularly to a connector capable of connecting a male connector such as various medical devices, and an infusion set including the connector.

1, 110, 120, 130: connector 2: housing 3, 300: elastic valve body 4: insertion port 5: cap 6, 60, 600: holder 7, 700: top cap 8: bottom cap 9: slit 10: top Surface 11: Bottom surface 12: Constricted part 13: Central part 14: Peripheral part 15: Central part top surface area 16: Constricted part top surface area 17: Peripheral part top surface area 18: Central flat part 19 in the central part top surface area: Side wall portion 20 of the central top surface region: Curved surface portion 21 of the central top surface region: Peripheral plane portion 22 of the peripheral top surface region 22: Side wall portion 23 of the peripheral top surface region 23: Top annular groove 24: Top surface annular shape Groove bottom 25: Central bottom area 26: Constricted bottom area 27: Perimeter bottom area 28: Central plane area 29 in the central bottom area 29: Central protrusion 30 in the central bottom area 30: Side wall of the central bottom area Portion 31: Peripheral flat surface portions 32 and 320 in the peripheral bottom surface region Side wall portion 33 in the bottom surface region of the peripheral edge portion: bottom surface annular groove 34: groove bottom 35 in the bottom surface annular groove: side wall portion 36: hollow cylinder portion 37 of the top surface cap: flange portion 38 of the top surface cap: extension portion 39: edge 40 : Thread 41: Top cap locking projection 42: Inner wall 43: Bottom cap hollow tube portion 44: Bottom cap flange portion 45: Bottom cap locking projection 46: Outer tube portion 47: Male luer portion 48: Clamping Portion 49: Top side clamping unit 50: Bottom side clamping unit 51: Storage space 52, 520: Inner wall 53: Top side coupling unit 54: Bottom side coupling unit 55: Air gap 61: Holder body 62: Upstream port unit 63 : Downstream port part 64: liquid channel 65: positioning part 70: hollow part 71: hollow part 80 of holder: infusion set 81: bottle needle 82: first tube 83: drip tube 84: second tube 85: clamp 86: Third Tube 87: Lock connector 100: Male connector 101: Tip portion 200: Connector 202: Housing 203: Elastic valve body 204: Insert port 207: Top cap 208: Bottom cap 211: Bottom cap 212: Constricted portion 213: Central portion 214: Peripheral portion 245: bottom cap locking projection 248: clamping portion 251: receiving space 601: cock 602: holder body 603: upstream port portion 604: downstream port portion 605: branch port portion 606: liquid flow path A: elastic valve body Radial direction B: thickness direction of the elastic valve body C: male connector insertion direction D: reverse direction of the male connector insertion direction E: circumferential direction L of the elastic valve body L: curved surface in the major axis direction of the top surface of the elliptical top surface Part length P: Point located on the outermost side in the radial direction among the top surface side sandwiching parts Q: Point T1: located on the outermost side in the radial direction among the bottom surface side clamping parts Length T2 in the thickness direction of the peripheral edge when the valve body is not clamped by the clamping part: Length T3 in the thickness direction of the accommodating space when the elastic valve element is clamped by the clamping part: Elasticity Length V1 in the thickness direction of the peripheral portion when the valve body is held by the holding portion V1: Volume V2 of the peripheral portion when the elastic valve body is held by the holding portion: The elastic valve body is the holding portion Volume V3 of the peripheral portion when not held by the holding portion: Volume X1 of the accommodating space when the elastic valve body is held by the holding portion X1: Elastic valve when the elastic valve body is held by the holding portion Maximum outer diameter X2 of the body: Maximum outer diameter X3 of the elastic valve body in a state where the elastic valve body is not clamped by the clamping portion: Maximum inner diameter of the inner wall portion

Claims (11)

An elastic valve body having a top surface on which a slit is formed and a bottom surface opposite to the top surface;
A clamping portion that contacts the top and bottom surfaces of the elastic valve body and clamps the elastic valve body, and
When the elastic valve body is viewed from the top surface side, the clamping portion is provided so as to surround the slit, and the elastic valve body is located outside a position clamped by the clamping portion. Has a peripheral edge,
The connector is characterized in that a volume of the peripheral edge in a state where the elastic valve body is clamped by the clamping part is larger than a volume of the peripheral edge in a state where the elastic valve body is not clamped by the clamping part. The elastic valve body has a substantially circular outer shape when viewed from the top surface side,
A housing having an inner wall portion surrounding the elastic valve body in a radial direction of the elastic valve body outside the peripheral edge portion in the radial direction;
The connector according to claim 1, wherein a gap is provided between the peripheral edge portion and the inner wall portion in a state where the elastic valve body is sandwiched by the clamping portion. The elastic valve body has a substantially circular outer shape when viewed from the top surface side,
A housing having an inner wall portion surrounding the elastic valve body in a radial direction of the elastic valve body outside the peripheral edge portion in the radial direction;
2. The connector according to claim 1, wherein the entire area of the peripheral edge part and the inner wall part are in contact with each other in a state where the elastic valve body is held by the holding part. The elastic valve body includes a constricted portion held by the holding portion,
In a cross section perpendicular to the radial direction and parallel to the thickness direction of the elastic valve body, the inner diameter of the inner wall portion is maximized at a position outside the radial direction with respect to the constricted portion. The connector according to claim 2 or 3.   In the cross section parallel to the thickness direction, the inner wall portion has a curved shape protruding outward in the radial direction so that the inner diameter becomes maximum at a position outside the radial direction with respect to the constricted portion. The connector according to claim 4. The clamping portion is provided in the housing;
The clamping portion includes an annular top surface side clamping portion that contacts the top surface of the elastic valve body, and an annular bottom surface side clamping that contacts the bottom surface and clamps the elastic valve body together with the top surface side clamping portion. And comprising
In the cross section perpendicular to the radial direction, the peripheral edge portion is a top surface that connects the inner wall portion, the top surface side clamping portion, the bottom surface side clamping portion, one end of the inner wall portion, and the top surface side clamping portion. Accommodated in an accommodation space defined by a side coupling part and a bottom surface side coupling part that connects the other end of the inner wall part and the bottom surface side clamping part,
The air gap is provided between the peripheral edge portion and the top surface side coupling portion and / or the bottom surface side coupling portion in a state where the elastic valve body is sandwiched by the clamping portion. The connector according to any one of 2 to 5. The clamping portion is provided in the housing;
The clamping portion includes an annular top surface side clamping portion that contacts the top surface of the elastic valve body, and an annular bottom surface side clamping that contacts the bottom surface and clamps the elastic valve body together with the top surface side clamping portion. And comprising
In the cross section perpendicular to the radial direction, the peripheral edge portion is a top surface that connects the inner wall portion, the top surface side clamping portion, the bottom surface side clamping portion, one end of the inner wall portion, and the top surface side clamping portion. Accommodated in an accommodation space defined by a side coupling part and a bottom surface side coupling part that connects the other end of the inner wall part and the bottom surface side clamping part,
The peripheral edge portion and the entire area of the top surface side coupling portion and / or the entire area of the bottom surface side coupling portion are in contact with each other in a state where the elastic valve body is clamped by the clamping portion. The connector according to any one of 2 to 5. An elastic valve body having a top surface formed with a slit and a bottom surface opposite to the top surface, and having a substantially circular outer shape when viewed from the top surface side;
A housing having a clamping portion that contacts the top surface and the bottom surface of the elastic valve body and sandwiches the elastic valve body so as to surround the slit when the elastic valve body is viewed from the top surface side; With
The housing includes an inner wall portion that surrounds the elastic valve body in a radial direction of the elastic valve body outside the clamping portion in the radial direction,
The maximum inner diameter of the inner wall portion is larger than the maximum outer diameter of the elastic valve body in a state where the elastic valve body is not clamped by the clamping portion.   The connector according to claim 8, wherein a maximum inner diameter of the inner wall portion is larger than a maximum outer diameter of the elastic valve body in a state where the elastic valve body is held by the holding portion.   In a state where the elastic valve body is clamped by the clamping portion, the inner wall portion comes into contact with the outer wall of the elastic valve body so that the maximum inner diameter of the inner wall portion is equal to the maximum outer diameter of the elastic valve body. The connector according to claim 8, wherein the connectors are equal.   An infusion set comprising the connector according to any one of claims 1 to 10.

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